20768525 has 6 divisors (see below), whose sum is σ = 25753002. Its totient is φ = 16614800.

The previous prime is 20768497. The next prime is 20768549. The reversal of 20768525 is 52586702.

It can be written as a sum of positive squares in 3 ways, for example, as 1522756 + 19245769 = 1234^2 + 4387^2 .

It is not a de Polignac number, because 20768525 - 2¹⁰ = 20767501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 415346 + ... + 415395.

It is an arithmetic number, because the mean of its divisors is an integer number (4292167).

Almost surely, 2^20768525 is an apocalyptic number.

20768525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20768525 is a deficient number, since it is larger than the sum of its proper divisors (4984477).

20768525 is an equidigital number, since it uses as much as digits as its factorization.

20768525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830751 (or 830746 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 20768525 is about 4557.2497188546. The cubic root of 20768525 is about 274.8749844987.

It can be divided in two parts, 2076 and 8525, that added together give a palindrome (10601).

The spelling of 20768525 in words is "twenty million, seven hundred sixty-eight thousand, five hundred twenty-five".